<Canvas
    xmlns="http://schemas.microsoft.com/client/2007"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    
  <!-- emphasize Fill="black"-->
  <Ellipse Height="90" Width="90" Canvas.Left="10" Canvas.Top="10"
      Fill="black"/> <!-- SolidColorBrush by color name. -->
      
  <!-- emphasize Fill="#000000"-->
  <Ellipse Height="90" Width="90" Canvas.Left="110" Canvas.Top="10"
      Fill="#000000"/> <!-- SolidColorBrush by 6-digit hexadecimal notation. -->
      
  <!-- emphasize Fill="#ff000000"-->
  <Ellipse Height="90" Width="90" Canvas.Left="10" Canvas.Top="110"
      Fill="#ff000000"/> <!-- SolidColorBrush by 8-digit hexadecimal notation. -->
      
  <Ellipse Height="90" Width="90" Canvas.Left="110" Canvas.Top="110">
    <!-- begin emphasis -->
    <Ellipse.Fill>
    
      <!-- SolidColorBrush by object element syntax. -->
      <SolidColorBrush Color="Black"/>
    </Ellipse.Fill>
    <!-- end emphasis -->
  </Ellipse>
</Canvas>
